diff --git a/connection.sample.py b/connection.sample.py
index 7887116..fe41a36 100644
--- a/connection.sample.py
+++ b/connection.sample.py
@@ -1,7 +1,7 @@
 # 各変数に適切な値を設定し，ファイル名を connection.py として保存すること
 
-OPENAI_ORGANISATION = 'org-XXXXXXXXXXXXXXXXXXXXXXXX' \
+OPENAI_ORGANISATION: str = 'org-XXXXXXXXXXXXXXXXXXXXXXXX' \
         # Organisation ID
-OPENAI_API_KEY = 'sk-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' \
+OPENAI_API_KEY: str = 'sk-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' \
         # API Key
 
diff --git a/main.py b/main.py
index bb2f3eb..39ec9d4 100644
--- a/main.py
+++ b/main.py
@@ -1,17 +1,51 @@
 import pygame
 from pygame.locals import *
 import sys
+import pytchat
+import time
+import random
+from talk import Talk
+
+
+YOUTUBE_ID: str = 'aq3QwuYz-KU'
 
 
 class Main:
     @classmethod
     def main (cls) -> None:
         pygame.init ()
+        screen: pygame.Surface = pygame.display.set_mode ((1024, 768))
+        balloon = pygame.transform.scale (pygame.image.load ('talking.png'),
+                                          (1024, 384))
+        pygame.mixer.init (frequency = 44100)
+        noon = pygame.mixer.Sound ('noon.wav')
 
-        screen: pygame.Surface = pygame.display.set_mode ((640, 480))
+        live_chat = pytchat.create (video_id = YOUTUBE_ID)
+
+        user_font = pygame.font.SysFont ('notosansjpregular', 32,
+                                         italic = True)
+        nizika_font = pygame.font.SysFont ('07にくまるフォント', 50)
 
         while (True):
-            screen.fill ((255, 255, 255))
+            screen.fill ((0, 255, 0))
+
+            if live_chat.is_alive ():
+                messages: list[str] = [c.message
+                                       for c in live_chat.get ().items]
+
+                if messages:
+                    message: str = random.choice (messages)
+                    answer: str = Talk.main (message)
+
+                    screen.blit (balloon, (0, 0))
+                    screen.blit (user_font.render ('> ' + message, True,
+                                                   (0, 0, 0)),
+                                 (120, 70))
+                    screen.blit (nizika_font.render (
+                        answer, True, (128, 0, 0)), (100, 150))
+
+                    noon.play ()
+
             pygame.display.update ()
 
             for event in pygame.event.get ():
@@ -19,6 +53,7 @@ class Main:
                     pygame.quit ()
                     sys.exit ()
 
+            time.sleep (10)
 
 if __name__ == '__main__':
     Main.main ()
diff --git a/noon.wav b/noon.wav
new file mode 100644
index 0000000..2bccb0b
Binary files /dev/null and b/noon.wav differ
diff --git a/talking.png b/talking.png
new file mode 100644
index 0000000..66eeffe
Binary files /dev/null and b/talking.png differ